Spiegelau's Authentis collection is notable as one of the most dynamic and practical wine glass collections on the market. It has all the style, class, and durability, of the highest end glasses, but at a reasonable price. Each Spiegelau Authentis collection glass has extra capacity, so it can hold a full serving and still have ample evaporation surface for a wine's full aroma to rise in its tapered chimney. The glasses are machine-blown of 5 percent lead crystal, providing excellent transparency and brilliance for showcasing color and clarity. Spiegelau Authentis Collection includes a set of whiskey tumblers that brings all the oenology of the collection to spirits.